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Posted to issues@hbase.apache.org by "Jimmy Xiang (JIRA)" <ji...@apache.org> on 2013/08/24 01:45:52 UTC
[jira] [Updated] (HBASE-9321) Contention getting the current user
in RpcClient$Connection.writeRequest
[ https://issues.apache.org/jira/browse/HBASE-9321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang updated HBASE-9321:
-------------------------------
Attachment: trunk-9321.patch
> Contention getting the current user in RpcClient$Connection.writeRequest
> ------------------------------------------------------------------------
>
> Key: HBASE-9321
> URL: https://issues.apache.org/jira/browse/HBASE-9321
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.95.2
> Reporter: Jean-Daniel Cryans
> Fix For: 0.98.0, 0.96.0
>
> Attachments: trunk-9321.patch
>
>
> I've been running tests on clusters with "lots" of regions, about 400, and I'm seeing weird contention in the client.
> This one I see a lot, hundreds and sometimes thousands of threads are blocked like this:
> {noformat}
> "htable-pool4-t74" daemon prio=10 tid=0x00007f2254114000 nid=0x2a99 waiting for monitor entry [0x00007f21f9e94000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:466)
> - waiting to lock <0x00000000fb5ad000> (a java.lang.Class for org.apache.hadoop.security.UserGroupInformation)
> at org.apache.hadoop.hbase.ipc.RpcClient$Connection.writeRequest(RpcClient.java:1013)
> at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1407)
> at org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1634)
> at org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1691)
> at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.multi(ClientProtos.java:27339)
> at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:105)
> at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:43)
> at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:183)
> {noformat}
> While the holder is doing this:
> {noformat}
> "htable-pool17-t55" daemon prio=10 tid=0x00007f2244408000 nid=0x2a98 runnable [0x00007f21f9f95000]
> java.lang.Thread.State: RUNNABLE
> at java.security.AccessController.getStackAccessControlContext(Native Method)
> at java.security.AccessController.getContext(AccessController.java:487)
> at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:466)
> - locked <0x00000000fb5ad000> (a java.lang.Class for org.apache.hadoop.security.UserGroupInformation)
> at org.apache.hadoop.hbase.ipc.RpcClient$Connection.writeRequest(RpcClient.java:1013)
> at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1407)
> at org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1634)
> at org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1691)
> at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.multi(ClientProtos.java:27339)
> at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:105)
> at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:43)
> at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:183)
> {noformat}
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